maybe u want to try a stew ?
if rmb jap they normally cook such fish in a stew, with miso or
sake. to mask the fishy smell. u can find some recepies
online.
but u should get a kelp it is one big piece of seaweed soke in
water, then throw in to a pot of water, add some vegs and chicken ,
just turn it into a hotpot or sth like that.
if not u can chop it up into smaller pieces, powder it and deep
fry.